Which of the following is the correct increas | vedclass

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(A) All the given ions are isoelectronic,meaning they have the same number of electrons ($10$ electrons each).For isoelectronic species,the ionic radi

Vedclass · Accepted Answer

$Mg^{2+} < Na^+ < F^- < O^{2-} < N^{3-}$

Vedclass · Answer

(A) All the given ions are isoelectronic,meaning they have the same number of electrons ($10$ electrons each).For isoelectronic species,the ionic radius decreases as the nuclear charge (atomic number) increases.The atomic numbers are: $N (7)$,$O (8)$,$F (9)$,$Na (11)$,$Mg (12)$.As the positive charge increases,the effective nuclear charge increases,pulling the electrons closer to the nucleus,thus decreasing the ionic radius.Conversely,as the negative charge increases,the electron-electron repulsion increases,leading to a larger ionic radius.Therefore,the increasing order of ionic radii is: $Mg^{2+} < Na^+ < F^- < O^{2-} < N^{3-}$.

Which of the following is the correct increasing order of ionic radii for $N^{3-}$,$Na^+$,$F^-$,$O^{2-}$,and $Mg^{2+}$?

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